Question

_+_+_=30(1,3,5,7,9,11,13,15)

Answer 1

no its not possible as number of blanks are odd in number and digits to be filled are odd too.....
and odd times odd is an odd number only but we know that 30 is an even number

Answer 2

This is not possible because this is addition of odd number for odd times so it will never give even addition.